<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
	</head>
	<body>
		<select id="sl" name="">
			<option value="1">选项1</option>
			<option value="2">选项2</option>
			<option value="3">选项3</option>
		</select>
		<script type="text/javascript">
			$('#sl').on('change', function() {
				console.log(this.value);
			})
		</script>
	</body>
</html>
